I don't think people are lying when they say there are girls that throw quite a bit harder than what you posted at those ages. We played the Beverly Bandits 10u team last fall. They have a girl that was throwing a consistent 52-54 mph and another that is throwing 50-51 mph. When you get to big tournaments like PGF Nationals it will be pretty common to see 50 mph pitchers at the 10u level.
If I remember correctly last year at 10u PGF Nationals there was a girl throwing high 50's and may have been hitting 60 mph. Not saying it is common but there are some very hard throwing girls at 10u here and there.
To the O.P. I believe you daughter is doing pretty darn well in terms of speed, especially considering she has only been pitching 8 months. From what you stated she is really gaining speed quickly. Keep up the hard work, and good luck.
Fair enough...then I want to meet those catchers...not the pitchers...
I have a 10U pitcher...comes in Friday night with older sister and dad (pitcher has been with me for over a year but sis hasn't caught for her in a year since going away to college). Sis is a D2 first baseman who is very athletic with a great glove...was terrified once Morgan started throwing full...Morgan throws 47 mph. With her advanced leg drive mechanics, she is releasing the ball from about 29'. In baseball terms, she is throwing high 80's
Come to my facility, I'll set my Atec at 60 mph from 30' and ask you to catch the ball...that's like a baseball pitchers throwing 120 MPH...B U L L O N E Y
Note: you would have to sign the death waiver to do this